In my view the MSM went from “strong liberal bias” to “full fledged members of the regime” in 2008.
I think it was a lot earlier. Like 1980 but there’s no question they hit a whole other level in 2008.
On the 80 thing I would cite the actions the MSM of the day took to crucify Reagan throughout the 80s including their backflips over Iran Contra and the various actions Ronnie took against muslims.
Yes they are FAR worse today. But they have been very very in the tank for decades.